KEEP UP EFFICIENCY

NZ Truth, Issue 1178, 28 June 1928, Page 15

KEEP UP EFFICIENCY

Be Generous With the Dinkum Oil -IT 'gives -food for thought to realize that one may possess an engine worth many hundreds of pounds, which would yet be utterly useless but for a few shillings' worth of lubricating oil. WITHOUT plenty '.of good clean oil If no lubricant were present, the and a properly arranged system bearing would wear out In a few revoof forcing or leading it to the lutions. bearing centres, the finest engine ever When oil is supplied, however, the produced would be worth less than the moving shaft drags the oil round by metal it is made of. means of a rotary suctional force, and The importance of correct lubrica- the two metal /surfaces are never 'at tion for any mechanism cannot be any time m contact, over-estimated, and m a motor engine The oil film is maintained during the perfect lubrication is absolutely vital, whole period of motion, and the metals owing to the exceptionally high <3p9eds only come into contact at very low at which the bearing surfaces run. speeds and when at rest. ■ Furthermore, When running at high In a motor engine great care Is speeds, enormous loads have to be bus- taken to force oil under pressure to tamed by the bearing parts. all main bearing parts, and it is a For instance,' a crank pin m an small matter for the driver to see that engine running up to 4000 revolutions his engine is supplied with good, clean /per minute m the ordinary touring car lubricant at frequent intervals, has to support a load of over a ton. If an engine were supplied with It can do this for thousands of miles, fresh oil every day its life would be but only if supplied with plenty of oil. very greatly prolonged. In a fast-moving bearing/such The moving par }L o L a mc a a r .S?« as a* crank pin orf main bearing m are difficult to .ma intaln m a state a motor engine, {he film of lubri- of l P e l !% t lubric *i'° f n ..f r n e J r«*«rv cation Is maintained m rather a which the movement is not : rotary, newjllar mannur but whose range' of movement is peculiar manner. very sma| ,^ such f(>p inßtance , The bearing Is, m fact, self-feeding, the shackle pins. so long as It can secure a supply of Th(J tendency nere ls for the bearing oil. No bearing Is,' ef course, abso- to force the lubrican t away from the lutely tight. point of contact, and it is obvious, It must have play, and the natural therefore> that the non-rotary bearings tendency of the bearing is for the s hould be kept well supplied by means moving member to rub on the lowest of the grease gun or otherwise as part of the bearing. necessary.